*/ class WPUPG_Addons { /** * Register actions and filters. * * @since 3.0.0 */ public static function init() { } /** * Check if a particular addon is active. * * @since 3.0.0 * @param mixed $addon Addon to check. */ public static function is_active( $addon ) { return apply_filters( 'wpupg_addon_active', false, $addon ); } } WPUPG_Addons::init();